scholarly journals Mineralogical and Geochemical Characterization of Talc from Two Mexican Ore Deposits (Oaxaca and Puebla) and Nine Talcs Marketed in Mexico: Evaluation of Its Cosmetic Uses

Minerals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 388
Author(s):  
Teresa Pi-Puig ◽  
Dante Yosafat Animas-Torices ◽  
Jesús Solé
Keyword(s):  
Chemical Characterization ◽  
Short Wave ◽  
Ore Deposits ◽  
X Ray Diffraction ◽  
Mineralogical Characterization ◽  
Chemical Impurities ◽  
Icp Ms ◽  
Two Samples ◽  
Physical And Chemical

The detailed mineralogical, physical and chemical characterization of nine samples of imported cosmetic talc and of two samples of talc from currently non-productive Mexican ore deposits (Oaxaca and Puebla States) is presented. The imported cosmetic talc was classified into two groups, considering whether they are packed in the country of origin or in Mexico and considering their price. X-ray diffraction, infrared short wave, thermogravimetric analysis and scanning electron microscopy were used for mineralogical characterization. For the physical characterization, colorimetry and laser granulometry were used. The chemical composition (major, trace elements) was studied by ICP-MS. It was concluded that only the highest priced and imported in packaged form talcs meet the specific purity requirements for a talc of cosmetic type. The talcs that are packed in Mexico and the talc of the studied Mexican deposits present mineralogical and chemical impurities that make their use difficult in the manufacture of high-quality cosmetic talc. The low-price talc should not be sold as cosmetic talc, and the regulations in Mexico on this subject should be reviewed and updated.

scholarly journals Mineralogical, Physicochemical and Morphological Characterization of Okpella Clay

Mining Revue ◽  
2021 ◽  
Vol 27 (4) ◽  
pp. 78-82
Author(s):  
Nurudeen Salahudeen ◽  
Aminat Oluwafisayo Abodunrin
Keyword(s):  
Ph Value ◽  
Chemical Characterization ◽  
Morphological Characterization ◽  
X Ray Diffraction ◽  
Local Clay ◽  
Mineralogical Characterization ◽  
X Ray ◽  
Edo State ◽  
Fluorescence Analyzer

Abstract Local clay mineral was mined from Okpella Town, Etsako Local Government Area of Edo State, Nigeria. Mineralogical characterization of the clay was carried out using X-ray diffraction analyzer. Chemical characterization of the clay was carried out using X-ray fluorescence analyzer and the pH analysis of the clay was carried out using pH meter. The mineralogical analysis revealed that the clay was majorly a dolomite mineral having 72% dolomite. The impurities present are 18% cristobalite, 4.1% garnet, 5% calcite and 1% quicklime. The pH analysis of the clay revealed that the clay was acidic having average pH value of 3.9. The pH determined for the 1:1, 1:2, 1:4, 1:8 and 1:10 samples were 3.61, 3.85, 3.85, 4.05 and 4.09, respectively.

Smectite clay from the Sabga deposit (Cameroon): mineralogical and physicochemical properties

Clay Minerals ◽  
2013 ◽  
Vol 48 (3) ◽  
pp. 499-512 ◽  
Author(s):  
J. R. Mache ◽  
P. Signing ◽  
A. Njoya ◽  
F. Kunyukubundo ◽  
J. A. Mbey ◽  
...  
Keyword(s):  
Waste Water Treatment ◽  
Size Fraction ◽  
Chemical Properties ◽  
Chemical Characterization ◽  
Exchange Capacity ◽  
Mineralogical Characterization ◽  
North West ◽  
Potential Applications ◽  
Physical And Chemical

AbstractThe physicochemical and mineralogical characterization of the <250 μm particle-size fraction from six clay-rich samples from the Sabga deposit (north-west, Cameroon) were carried out to evaluate their potential applications. The major clay mineral is dioctahedral smectite and minor kaolinite is present in three of the clay samples. Cristobalite, feldspars, ilmenite and heulandite are accessory minerals. Application of the Greene-Kelly test revealed that the smectite present is montmorillonite. The chemical composition (wt.%) of the bulk clays consists of (66–70%) SiO2, (13–16%) Al2O3and (2–7%) Fe2O3. Physico-chemical characterization of the clays showed that the cation exchange capacity (CEC) and the specific surface area range from 38 to 46 meq/100 g and from 33 to 90 m2/g respectively. The physical and chemical properties are fully compatible with potential uses in environmental applications. After purification and chemical modification, these materials could also be used in refining edible oil as adsorbent, waste water treatment and wine technology.

Mineralogical and crystal-chemical characterization of the talc ore deposit of Minzanzala, Gabon

Clay Minerals ◽  
2019 ◽  
Vol 54 (3) ◽  
pp. 245-254
Author(s):  
Mathilde Poirier ◽  
Jean-Eudes Boulingui ◽  
François Martin ◽  
Michel Mbina Mounguengui ◽  
Charles Nkoumbou ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Spectroscopic Characterization ◽  
Industrial Applications ◽  
Crystal Chemical ◽  
X Ray Diffraction ◽  
Wide Range ◽  
Two Samples ◽  
Fe Oxyhydroxides ◽  
Chemical Purity

AbstractThis research aims to characterize the mineralogical and crystal-chemical purity of two samples of natural talc (BTT6, BTT7) from the occurrence ‘Ecole1’ in the deposit of Minzanzala, southwest Gabon. X-ray diffraction and modal-composition calculations demonstrated the presence of quartz and Al–Fe-bearing phases (kaolinite and/or chlorite and/or Al–Fe oxyhydroxides) as accessory minerals in both ores. In contrast, the chemical and spectroscopic characterization of the talc component revealed remarkable chemical purity expressed by very low Fe contents. According to these results, the talc of Minzanzala might be used as a filler in a wide range of industrial applications, such as in cosmetics, paints, polymers or ceramics.

scholarly journals Mineralogical and Chemical Characterization of Bajrawia Iron Ore, Sudan

2019 ◽  
Vol 8 (1) ◽  
pp. 8-14
Author(s):  
Ahmed Mohammedelmubarak Abbaker ◽  
Eltahir Mohamed Moslim ◽  
Montasir Sabbah El Din Elsalmawy
Keyword(s):  
Iron Ore ◽  
Chemical Characterization ◽  
High Porosity ◽  
Rock Matrix ◽  
X Ray Diffraction ◽  
Mineralogical Characterization ◽  
X Ray ◽  
Iron Mineral ◽  
Fluorescence Energy

In this contribution, the mineralogical and chemical characterization of Bajrawia iron ore is investigated. The chemical analysis was conducted using atomic absorption spectroscopy, X-ray Fluorescence, Energy Dispersive X-ray and titration. The mineralogical characterization was obtained by optical microscopy and X-ray diffraction. The physical properties such as densities, water content and porosity were determined. It was found that Bajrawia iron ore contains about 35.5% Fe and some impurities like phosphorus and silica. Goethite is the major iron mineral associated with minor contents of hematite, kaolinite and quartz. SEM photo showed that the main minerals are goethite, clay minerals and quartz. The ore has low density because it has high porosity degree. This type of iron ore is disseminated in rock matrix and would be difficult to process.

scholarly journals GEOCHEMICAL AND MINERALOGICAL CHARACTERIZATION OF SOME CLAY MATERIALS AS FLUORIDE ADSORBENT FROM GROUNDWATER IN GHANA

2020 ◽  
Vol 4 (2) ◽  
pp. 135-139
Author(s):  
Eric E. Bayari ◽  
Maxwell Anim- Gyampo ◽  
Solomon S.R. Gidigasu ◽  
Gordon Foli
Keyword(s):  
Major Elements ◽  
Fluoride Removal ◽  
Batch Test ◽  
X Ray Diffraction ◽  
Mineralogical Characterization ◽  
East Region ◽  
Icp Ms ◽  
Upper East Region ◽  
Ph Range

This research conducted in the Upper East Region of Ghana characterizes Termitaria and residual clays from Navrongo to establish effective fluoride adsorbent from boreholes in Bongo area. Specific objectives are to determine (1) geochemical and mineralogical compositions of the clays using ICP-MS and X-ray diffraction devices, respectively; (2) fluoride degradation in groundwater using a Batch test (3) water quality after fluoride removal. The Batch test uses 250 ml of groundwater with 2.29 mg/l fluoride and clay masses of 25, 50, 100 and 200 grams to perform within a minimum and varying time of 10 minutes to a maximum of 120 minutes. Results indicate enrichments of major elements in Termitaria clay and trace elements in residual clay. Fluoride reduces to 0.778 mg/l and 0.294 mg/l at a mass of 0.8 kg/l over 80 minutes for Termitaria and residual clays, respectively. Optimum defluoridation time occurs within an hour in the pH range of 7.83 to 8.04. Quartz-hematite-magnetite-illite-montmorillonite suite occurs in residual clay with defluoridation capacity of 66.25 %, while quartz-illite-montmorillonite suite occurs in Termitaria clay with defluoridation capacity of 87.25 %, and constitute the more efficient adsorbent. TDS and conductivity are within WHO standard guidelines, which confirms the clays as non-toxic.

Electrodeposition Process of Composite Ni-P+Ni(OH)2+PTFE Coatings

2015 ◽  
Vol 228 ◽  
pp. 108-115
Author(s):  
B. Łosiewicz ◽  
Magdalena Popczyk
Keyword(s):  
Steel Substrate ◽  
Composite Coatings ◽  
Low Carbon Steel ◽  
Chemical Characterization ◽  
Deposition Process ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Physical And Chemical ◽  
Galvanostatic Conditions

Co-deposition process of amorphous nickel and PTFE particles in the presence of Ni (OH)2carrier suspended in the bath by magnetic stirring, was investigated. Composite Ni-P+Ni (OH)2+PTFE coatings and comparative Ni-P deposits, were electrodeposited on low carbon steel substrate under galvanostatic conditions at room temperature. The physical and chemical characterization of the coatings was carried out using X-Ray diffraction analysis and microanalysis, stereometric quantitative microscopy and atomic absorption spectroscopy. The optimum production conditions of the composite coatings based on the Ni-P matrix into which PTFE and Ni (OH)2components can be embedded uniformly, were found.

scholarly journals Physical and Chemical Characterization of an Oyster Hemagglutinin

1969 ◽  
Vol 244 (15) ◽  
pp. 4128-4135
Author(s):  
R T Acton ◽  
J C Bennett ◽  
E E Evans ◽  
R E Schrohenloher
Keyword(s):  
Chemical Characterization ◽  
Physical And Chemical Characterization ◽  
Physical And Chemical

scholarly journals New Insights into the Crystal Chemistry of Elpidite, Na2Zr[Si6O15]·3H2O and (Na1+YCax□1−X−Y)Σ=2Zr[Si6O15]·(3−X)H2O, and Ab Initio Modeling of IR Spectra

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2160
Author(s):  
Alexander Bogdanov ◽  
Ekaterina Kaneva ◽  
Roman Shendrik
Keyword(s):  
Ir Spectra ◽  
Structural Models ◽  
Chemical Characterization ◽  
Chemical Compositions ◽  
X Ray Diffraction ◽  
Special Group ◽  
X Ray ◽  
Influence Of Water ◽  
Radioactive Species

Elpidite belongs to a special group of microporous zirconosilicates, which are of great interest due to their capability to uptake various molecules and ions, e.g., some radioactive species, in their structural voids. The results of a combined electron probe microanalysis and single-crystal X-ray diffraction study of the crystals of elpidite from Burpala (Russia) and Khan-Bogdo (Mongolia) deposits are reported. Some differences in the chemical compositions are observed and substitution at several structural positions within the structure of the compounds are noted. Based on the obtained results, a detailed crystal–chemical characterization of the elpidites under study was carried out. Three different structure models of elpidite were simulated: Na2ZrSi6O15·3H2O (related to the structure of Russian elpidite), partly Ca-replaced Na1.5Ca0.25ZrSi6O15·2.75H2O (close to elpidite from Mongolia), and a hypothetical CaZrSi6O15·2H2O. The vibration spectra of the models were obtained and compared with the experimental one, taken from the literature. The strong influence of water molecule vibrations on the shape of IR spectra of studied structural models of elpidite is discussed in the paper.

Sign in / Sign up

Export Citation Format

Share Document